Francis b



(No Model.) '2 Shets'eSh'et 1.

- L. J. KNOWLES, Decd.

F. B/KNowms &. H. 'A. MARSH, Surviving Executo'rs.

WEFT STOP. MOTION FOR LOOMS.

Patented Jan. 24, 1888.

WITNESSES 41m. [INVENTDR mwdm.

n PETERS, Fnmmmm m Walhinglnn. n.c.

(No Model.) I I L. J. KNOWLES, D GO'd.

B. KNOWLES &. E ArMABsH, Surviving Executors. WEFT STQP MOTION FOR LQOMS.

-2 Shegts-Sheefi2. I

No. 376,775. Patented Janpz r, 1888.

e EIIdDlI 'WITNESEEE v [INVEN'I' [3H,]

UNITED STATES PATENT EIcE. T

LUOIUS J. K OWLES, OF WOROESTER, MASSAOHUSETTS;' FRANCIS KNOWLES AND HENRY A. MARSH SURVIVING EXEOUTORS OF SAID LUOIUS J. KNOWLES, DECEASED. I

WEFT STOP-MOTION FOR Looms.

SPECIFICATION forming part of Letters Patent No.'376,'775, dated January 24-, 1888. Application filed April 20, 1882. Serial No. 58,947. (No modelJ Iatented in England July 31, 1882, No. 3,629.

To all whom it may concern.-

Be it known that I,- LUOIUS J. KNOWLES, of Worcester, in the State of Massachusetts, have invented a new and useful Improvement in Weft Stop-Motions for Looms, (for which British Letters Patent have already been granted to me under date of July 31, 1882, and numbered 3,629,) of which the following is a specification.

.The present invention, like several others intimately related to this and to each other that form the subjects-matter of several other applications filed simultaneously herewith, has reference to that class of stop-motions in which the weft-feeler wires are pivoted to the front of the lay within the warp, as distinguished from stop-motions employing pivoted weft-feelers that can only be used'outside of the warp at the end of the lay; and the main feature of the present invention consists in placing the dagger and feeler-wires upon a sin gle pivot.

Other features of the invention relate to details of construction; and of these the most important are combinations in which, while the dagger and feeler-wires are pivoted together upon the front of the lay, with the feeler-wire within the warp, as above mentioned,they are controlled in their normal vibrations by a de Vicewhich I term the governing-rod. This device isfully described in my application Serial No. 58, 946, originally filed simultaneously herewith, and subsequently renewed June 27, 1885, Serial No. 1'10, 015. It isa substantially 5 perpendicular rod,whose upper and free end passesthrough a hole in arigid attachment to the lay, while its lower end is so pivoted that the rod will vibrate with the lay, but upon a different center. When the lay moves back- 0 'ward, the Said rod not only swings back with it, but has at its upper end a longitudinal motion upward through the hole, and in course of its double motion strikes and lifts a horizontal lever which is pivoted to the lay. When 5 the lay moves forward, the upper part of the governing-rod recedes through the hole and the horizontal lever follows it down, either from, its own weight or by force of a spring.

V In the belt-shifting mechanism and a'shipp'er-lever,

stop-motion of said application No. 170,015 the said horizontal leverserves' as the dagger of the weft stop-motion and 'is con; nected by a connectingrod and crank-disk with the feeler-shaft. Consequently,wl1en ,the governing-rod lifts the rear end of the dagger,

to which the connecting-rod is attached, it

raises the feeler-wires also, and when the dag-3 gerfollows the recedinggoverning-rod down it'pulls down the feeler-wires.

In the present inventionin operative mech-- anism I make use of substantially the sameoo.

governing-rod,and the horizontal lever which is lifted by it and follows 'it down performs the office. of a dagger, substantially as i'nthe mechanism of my said application No. 17 0, 015;-

-'but in the present mechanism, insteadof there 6 In the drawings, Figure 1 isa side elevation, 7 5 partially in'section, of so much of a loom as is necessary to illustrate the invention herein claimed. Fig. 2 is a partial front elevation of the lay and parts of the stop-motion thereupon. Fig. 3 is a plan of the same. Fig. 4, is a par-. tial plan of the breast-beam and mechanism supported thereby belonging to the belt-shifting mechanism operated by the dagger. Fig. 5 is a detail of construction.

A is the loom-frame. B is the breast-beam. T O is the shipper-lever shaft, being a rockshaft in suitable bearings beneath the breast beam. v It has connected'with it any ordinary O, for operating Said mechanism by hand.}--

D is the knock-off lever, the Same being-a weighted bent lever rocking upon a piny c yin a bracket, B, that is bolted to the back of the position and has a horizontal projection, e, to receive the thrust of the dagger, as hereinafter described. The lower arm is weighted and carries a pin, d, which is in constant contact with an arm or lever, E, rigidly secured to the shipper-lever shaft 0, so that when the dagger strikes the projection e of the knockoff lever the said pin (1 bears upon the arm E to rock the shipper-lever shaft and operate the belt-shifting mechanism.

L is the lay, provided with a slot, 8, at its upper front corner within the warp, as shown.

H is one of the lay-swords, pivoted to a pin, i, at the bottom of the loom-frame, the said pin being the center of vibration of the lay and of parts attached thereto.

J is a bracket secured to the lay in front of the said slot 8 by screws, as shown. Near the upper edge of the lay the bracket J has a projection, from a hole in which projects a pin, 6, which serves as a pivot for the dagger K. This'pin e is held in any required position in said hole by a screw, [2, and since the feelerwires and dagger are in one piece,as will hereinafter appear, the adjustment of both feeler-wires and dagger is regulated by this single screw. The dagger vibrates freely upon this fixed pin and is held thereon by a washer and screw, as shown. The rear end of the dagger may be so heavy relatively to the forward end that the rear end will tend to fall of itself and keep the point of the dagger up; but in the mechanism shown a spring, Z, one end of which passes through the pin 6, while the other bears upon a pin, t, in the dagger, tends to keep the rear end and the point of the dagger in these positions.

The feeler-wires ware secured to the rear end of the dagger by a screw, m, as shown. A stop, at, limits the downward vibration of the rear end of the dagger, and consequently the downward vibration of 'the feeler-wires when they go below the place of the weftthread. In the position shown in thedrawings the feeler-.wires have passed below the place of the weft-thread and the rear end of the dagger rests on the stop n, the point of the dagger being in position to strike the horizontal arm a of the knock-off lever before the finish of the forward movement of the lay. This horizontal arm a has a flange, as shown, to prevent the dagger from slipping over the arm.

P is the before-mentioned governing-rod, pivoted to a stand, R, upon the floor beneath the loom, as shown. Near its upper end it is bent, as shown, so that its upper portion is parallel with the front face of the lay. This upper portion enters a slot cut in the rear of the plate or bracket J in the'vertical plane of the dagger, and has a vertical play in this slot, as hereinafter described.

The adjustment is such that when thelay reaches a proper place in its backward movement the upper end of the governing-rod strikes the rear end of the dagger, and through the remainder of the backward movement of the slot in the back of the plate J and is followed down by the rear end of the dagger, which brings with it the feeler-wires, until, in the normal operation of the loom, they rest upon the weft-thread. If the weft-thread has been well thrown, the feeler-wires resting upon it hold up the dagger for a portion of the remainder of the forward movement of the lay, so that its point passes under the projection e of the knock-off lever; but if the weftthread has not been well thrown and the feelerwires fail to find it,'they fall immediatelyinto the slot 5 in the lay, and the point of the dagger rises, so as to strikethe said projection c and operate the belt-shifting mechanism.

In the normal operation of the loom, after the point of the dagger has passed under the arm e, the feeler-wires draw off from the weftthread and fall into the slot 8, in order that they may not interfere with the beating up of the weft. A slot is cut in the breast-beam, as shown in dotted lines, to receive the point of the dagger when it passes under the projection 6. It is of such shape as to permit the vibration of the dagger and feeler-wires to begin at any required time.

I do not claim herein the combination, with a lay and feeler-wires pivoted to thefront thereof, a feeler-operating lever, and a connection between said leverand said wires, of the vibrating rod P and bearing-point therefor outside and independent of the lay, the said pivot being provided with means of adjustment to and from the center of vibration of the lay, and the said vibrating rod being provided with a telescopic adjustment, as the same forms the subject-matter claimed in my application No. 170, 015.

The I before mentioned governing-rod is shown in the drawings adj ustable as to length,

and also as to the position of its pivot, but these adjustments are not herein claimed, since they form the subject-matter of claims in my said application No. 170,915.

I here .claim 1. In a weft stop-motion, the combination, with a lay provided with a slot at its upper front corner within the warp, of a dagger and feeler-wires provided withasingle pivot,from which they project in opposite directions, the said pivot being in front of said slot, and means for vibrating the combined feeler and dagger to feel for the weft, substantially as described.

2. The combination, with the lay L, provided with the slot 8 at its upper front corner, of the feeler-wires w, dagger K, and pivot ICC Igo

e, and the pivoted governing-rod P, substantially as described.

3. The combination, with the lay L, provided with slot 8, of the feeler-wires w, dagger D, provided'with pin d and projection e, sub- K, and pivot e, and the screw 12, substantially stantially as described, for the purpose speci as described. fied.

4. The combination, with the lay, dagger, 5 and weft-feeling devices, and the breast-beam, Witnesses:

shipper-lever shaft, and shipper-lever handle, J. M. 'RUSSELL, of the arm E and the-weighted elbow-lever H. H. MERRIAM.

Lncins J; KNOWLES); 

